syzkaller login: [ 30.877157] BUG: Bad rss-counter state mm:000000008c8ba345 type:MM_FILEPAGES val:33 [ 30.878309] BUG: Bad rss-counter state mm:000000008c8ba345 type:MM_ANONPAGES val:22 [ 30.928859] ================================================================== [ 30.929831] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.930872] Read of size 8 at addr ffff888016dc5058 by task sshd/220 [ 30.931750] [ 30.932005] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.933015] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.934102] Call Trace: [ 30.934484] [ 30.934816] dump_stack_lvl+0x91/0xf0 [ 30.935372] print_report+0xcc/0x620 [ 30.935926] ? __virt_addr_valid+0x102/0x340 [ 30.936559] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.937274] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.937992] kasan_report+0xbe/0xf0 [ 30.938522] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.939237] vma_interval_tree_remove+0xc75/0xec0 [ 30.939937] vma_prepare+0xc54/0x11a0 [ 30.940512] __split_vma+0x5af/0x950 [ 30.941048] ? __pfx___split_vma+0x10/0x10 [ 30.941661] ? find_held_lock+0x2c/0x110 [ 30.942252] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.942907] ? lock_is_held_type+0x9f/0x120 [ 30.943524] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.944232] ? mtree_range_walk+0x632/0x900 [ 30.944875] ? mas_walk+0x5c7/0x7c0 [ 30.945417] do_vmi_munmap+0x1f1/0x2b0 [ 30.945988] mmap_region+0x1f9/0x2660 [ 30.946541] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.947126] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.947939] ? __pfx_lock_acquire+0x10/0x10 [ 30.948562] ? __pfx_mmap_region+0x10/0x10 [ 30.949160] ? security_mmap_addr+0x7d/0xa0 [ 30.949759] ? get_unmapped_area+0x1f5/0x3f0 [ 30.950382] do_mmap+0x854/0xf00 [ 30.950881] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.951442] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.952105] ksys_mmap_pgoff+0x3af/0x500 [ 30.952569] do_syscall_64+0x3f/0x90 [ 30.952995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.953563] RIP: 0033:0x7f3edf3c3d82 [ 30.953963] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 30.955813] RSP: 002b:00007ffe41bb1748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.956613] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3edf3c3d82 [ 30.957359] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3ede7fd000 [ 30.958092] RBP: 00007f3ede7fd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.958827] R10: 0000000000000812 R11: 0000000000000206 R12: 000055febdbfcec0 [ 30.959562] R13: 00007ffe41bb1760 R14: 00007ffe41bb1790 R15: 00007ffe41bb1af0 [ 30.960489] [ 30.960896] [ 30.961188] Allocated by task 213: [ 30.961776] kasan_save_stack+0x22/0x50 [ 30.962437] kasan_set_track+0x25/0x30 [ 30.963103] __kasan_slab_alloc+0x59/0x70 [ 30.963820] kmem_cache_alloc+0x16b/0x370 [ 30.964547] vm_area_dup+0x20/0x160 [ 30.965165] __split_vma+0x170/0x950 [ 30.965799] split_vma+0xc6/0x110 [ 30.966387] mprotect_fixup+0x8d2/0xb30 [ 30.967074] do_mprotect_pkey+0x87e/0xd40 [ 30.967790] __x64_sys_mprotect+0x78/0xc0 [ 30.968499] do_syscall_64+0x3f/0x90 [ 30.969148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.970041] [ 30.970329] Freed by task 213: [ 30.970870] kasan_save_stack+0x22/0x50 [ 30.971555] kasan_set_track+0x25/0x30 [ 30.972226] kasan_save_free_info+0x2b/0x50 [ 30.972888] __kasan_slab_free+0x10a/0x190 [ 30.973546] kmem_cache_free+0x10d/0x4d0 [ 30.974175] rcu_core+0x8c8/0x2860 [ 30.974725] __do_softirq+0x1b7/0x7d4 [ 30.975318] [ 30.975584] Last potentially related work creation: [ 30.976326] kasan_save_stack+0x22/0x50 [ 30.976814] __kasan_record_aux_stack+0x8e/0xa0 [ 30.977366] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.978003] remove_vma+0x139/0x170 [ 30.978441] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.978991] do_vmi_munmap+0x1f1/0x2b0 [ 30.979464] __vm_munmap+0x138/0x3a0 [ 30.979929] __x64_sys_munmap+0x59/0x80 [ 30.980408] do_syscall_64+0x3f/0x90 [ 30.980876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.981501] [ 30.981715] The buggy address belongs to the object at ffff888016dc5000 [ 30.981715] which belongs to the cache vm_area_struct of size 168 [ 30.983137] The buggy address is located 88 bytes inside of [ 30.983137] freed 168-byte region [ffff888016dc5000, ffff888016dc50a8) [ 30.984512] [ 30.984725] The buggy address belongs to the physical page: [ 30.985359] page:0000000072cd4c0a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16dc5 [ 30.986424] memcg:ffff88800e943901 [ 30.986847] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.987523] page_type: 0xffffffff() [ 30.987959] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.988860] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e943901 [ 30.989738] page dumped because: kasan: bad access detected [ 30.990380] [ 30.990594] Memory state around the buggy address: [ 30.991164] ffff888016dc4f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.992004] ffff888016dc4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.992840] >ffff888016dc5000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.993667] ^ [ 30.994370] ffff888016dc5080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.995211] ffff888016dc5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.996097] ================================================================== [ 30.997303] Disabling lock debugging due to kernel taint [ 32.794586] BUG: Bad rss-counter state mm:0000000017d96ccc type:MM_FILEPAGES val:33 [ 32.795376] BUG: Bad rss-counter state mm:0000000017d96ccc type:MM_ANONPAGES val:22 [ 33.287158] BUG: Bad rss-counter state mm:00000000362f9133 type:MM_FILEPAGES val:33 [ 33.288350] BUG: Bad rss-counter state mm:00000000362f9133 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20169' (ECDSA) to the list of known hosts. 2023/06/20 23:39:36 fuzzer started 2023/06/20 23:39:36 dialing manager at localhost:36067 2023/06/20 23:39:36 checking machine... 2023/06/20 23:39:36 checking revisions... [ 34.032380] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:39:36 testing simple program... [ 34.084523] cgroup: Unknown subsys name 'net' [ 34.128572] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:39:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000dc0 RDI=ffff888009c2d5b4 RBP=ffff888009c2d1c0 RSP=ffff8880094cfc90 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=ffff888014067000 R14=0000000000000000 R15=ffffffff8186c9a6 RIP=ffffffff8135bdae RFL=00000202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fdfcea4b900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fdfcf000650 CR3=000000000d0e4000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea00005e6100 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880143afb01 RSI=ffff8880143afb98 RDI=ffff8880143afb98 RBP=ffff8880143af570 RSP=ffff8880143af4a8 R8 =0000000000000001 R9 =ffff8880143af558 R10=0000000000038001 R11=000000000002ca18 R12=ffff8880143af578 R13=ffff8880143af560 R14=ffff8880143afb98 R15=ffff8880143af518 RIP=ffffffff81131236 RFL=00000202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efe6857a900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007efe6796acc0 CR3=000000000d60e000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=91ffbc6ff33fa80100000000000ae988 XMM05=51d347e45ca9b0350000000000132a30 XMM06=4fda316b135da52b0000000000131820 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000